Miata, MPV 3.0L, MX-3, MX-6, Protege, 323, 626 & 929

Inspect airflow meter for damage, and ensure measuring plate or cone moves smoothly. See Fig 1 , Fig 2 or Fig 3 . Disconnect airflow meter electrical connector. Move measuring plate or cone and measure resistance between terminals. See appropriate AIRFLOW METER TERMINAL RESISTANCE table. Replace sensor as necessary.

AIRFLOW METER TERMINAL RESISTANCE

Terminals ⁽¹⁾

Fully Closed: Ohms

Fully Open: Ohms

E2 & Vs

200-600

20-1000

E2 & Vc

200-400

E2 & THAa ⁽²⁾

-4°F (-20°C)

13,600-18,400

68°F (20°C)

2210-2690

2100-2690

140°F (60°C)

493-667

E1 & Fc

Infinite

⁽¹⁾	See Fig 1 for terminal identification.

⁽²⁾	Intake air thermosensor.

AIRFLOW METER TERMINAL RESISTANCE

Terminals ⁽¹⁾

Fully Closed: Ohms

Fully Open: Ohms

E2 & Vs

20-400

20-1000

E2 & Vc

⁽²⁾ 100-300

E2 & Vb

200-400

E2 & THAa ⁽³⁾

-4°F (-20°C)

13,600-18,400

68°F (20°C)

2210-2690

140°F (60°C)

493-667

E1 & Fc

Infinite

⁽¹⁾	See Fig 2 for terminal identification.

⁽²⁾	100-400 ohms on MX-6 and 626.

⁽³⁾	Intake air thermosensor.

AIRFLOW METER TERMINAL RESISTANCE

Terminals ⁽¹⁾

Temperature

Ohms

E2 & Vs

Closed

68°F (20°C)

200-600

Open

68°F (20°C)

200-1000

E2 & Vc ⁽²⁾

68°F (20°C)

200-400

E2 & THA ⁽³⁾

-4°F (-20°C)

10,000-20,000

68°F (20°C)

2000-3000

140°F (60°C)

400-700

⁽¹⁾	See Fig 3 for terminal identification.

⁽²⁾	Measurement is from closed to open.

⁽³⁾	Intake air thermosensor.

Fig 1: Airflow Meter Terminal ID (Miata, MX-3 SOHC, Protege & 323)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Airflow Meter Terminal ID (MPV 3.0L, MX-6 & 626)

Courtesy of MAZDA MOTORS CORP.

Fig 3: Airflow Meter Terminal ID (MX-3 DOHC & 929)

Courtesy of MAZDA MOTORS CORP.